1331020202031 has 48 divisors (see below), whose sum is σ = 2076866448384. Its totient is φ = 816563607552.

The previous prime is 1331020202027. The next prime is 1331020202089. The reversal of 1331020202031 is 1302020201331.

It is not a de Polignac number, because 1331020202031 - 2² = 1331020202027 is a prime.

It is a super-2 number, since 2×1331020202031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1331020201995 and 1331020202013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331020212031) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 93680530 + ... + 93694736.

It is an arithmetic number, because the mean of its divisors is an integer number (43268051008).

Almost surely, 2^{1331020202031} is an apocalyptic number.

1331020202031 is a deficient number, since it is larger than the sum of its proper divisors (745846246353).

1331020202031 is a wasteful number, since it uses less digits than its factorization.

1331020202031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16640 (or 16637 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1331020202031 its reverse (1302020201331), we get a palindrome (2633040403362).

The spelling of 1331020202031 in words is "one trillion, three hundred thirty-one billion, twenty million, two hundred two thousand, thirty-one".